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    netdevice zd1201: Use after free · b88a2a22
    Wang Chen authored
    | commit 3d29b0c3
    
    
    | Author: John W. Linville <linville@tuxdriver.com>
    | Date:   Fri Oct 31 14:13:12 2008 -0400
    |
    |     netdevice zd1201: Convert directly reference of netdev->priv to netdev_priv()
    |
    |     We have some reasons to kill netdev->priv:
    |     1. netdev->priv is equal to netdev_priv().
    |     2. netdev_priv() wraps the calculation of netdev->priv's offset, obviously
    |        netdev_priv() is more flexible than netdev->priv.
    |     But we cann't kill netdev->priv, because so many drivers reference to it
    |     directly.
    |
    |     OK, becasue Dave S. Miller said, "every direct netdev->priv usage is a bug",
    |     and I want to kill netdev->priv later, I decided to convert all the direct
    |     reference of netdev->priv first.
    |
    |     (Original patch posted by Wang Chen <wangchen@cn.fujitsu.com> w/ above
    |     changelog but using dev->ml_priv.  That doesn't seem appropriate
    |     to me for this driver, so I've revamped it to use netdev_priv()
    |     instead. -- JWL)
    
    This commit changed the allocation of netdev, but didn't change
    the free method of it.
    This causes "zd" be used after the memory, which is pointed by "zd", being
    freed by free_netdev().
    
    Signed-off-by: default avatarWang Chen <wangchen@cn.fujitsu.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    b88a2a22